feat: allow selecting shoots by condition

[uwe-mayer]

Until cloudoperators/greenhouse#1664 is in place and we can use the Greenhouse CEL package, this will allow us to target shoots by matching status.Conditions

[github-actions]

Merging this branch will not change overall coverage

Impacted Packages	Coverage Δ	🤖
github.com/cloudoperators/shoot-grafter/api/v1alpha1	0.00% (ø)
github.com/cloudoperators/shoot-grafter/controller/shoot	0.00% (ø)

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Coverage by file

Changed files (no unit tests)

Changed File	Coverage Δ	Total	Covered	Missed	🤖
github.com/cloudoperators/shoot-grafter/api/v1alpha1/careinstruction_types.go	0.00% (ø)	0	0	0
github.com/cloudoperators/shoot-grafter/api/v1alpha1/zz_generated.deepcopy.go	0.00% (ø)	0	0	0
github.com/cloudoperators/shoot-grafter/controller/shoot/shoot_controller.go	0.00% (ø)	0	0	0

Please note that the "Total", "Covered", and "Missed" counts above refer to code statements instead of lines of code. The value in brackets refers to the test coverage of that file in the old version of the code.

Changed unit test files

• github.com/cloudoperators/shoot-grafter/controller/shoot/shoot_controller_test.go